Mozilla Firefox up to 62.x Nested Event infinite loop

CVSS Meta Temp Score
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CTI Interest Score
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A vulnerability was found in Mozilla Firefox up to 62.x (Web Browser). It has been declared as problematic. This vulnerability affects an unknown code of the component Nested Event Handler. The manipulation with an unknown input leads to a infinite loop vulnerability. The CWE definition for the vulnerability is CWE-835. The product contains an iteration or loop with an exit condition that cannot be reached, i.e., an infinite loop. As an impact it is known to affect availability.

The bug was discovered 10/23/2018. The weakness was disclosed 10/23/2018 as MFSA 2018-26 as confirmed security advisory (Website). The advisory is available at This vulnerability was named CVE-2018-12392 since 06/14/2018. The attack can be initiated remotely. No form of authentication is required for a successful exploitation. Successful exploitation requires user interaction by the victim. The technical details are unknown and an exploit is not available. This vulnerability is assigned to T1499 by the MITRE ATT&CK project.

The vulnerability scanner Nessus provides a plugin with the ID 118406 (CentOS 6 : firefox (CESA-2018:3006)), which helps to determine the existence of the flaw in a target environment. It is assigned to the family CentOS Local Security Checks and running in the context l. The commercial vulnerability scanner Qualys is able to test this issue with plugin 197286 (Ubuntu Security Notification for Firefox Vulnerabilities (USN-3801-1)).

Upgrading to version 63.0 eliminates this vulnerability. A possible mitigation has been published immediately after the disclosure of the vulnerability.

The vulnerability is also documented in the vulnerability database at Tenable (118406). The entries 125961, 125963, 125964 and 125965 are pretty similar.







CPE 2.3info

CPE 2.2info


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VulDB Meta Base Score: 7.0
VulDB Meta Temp Score: 6.9

VulDB Base Score: 4.3
VulDB Temp Score: 4.1
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NVD Base Score: 9.8
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Class: Infinite loop
CWE: CWE-835 / CWE-404
ATT&CK: T1499

Local: No
Remote: Yes

Availability: 🔍
Status: Not defined

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Nessus ID: 118406
Nessus Name: CentOS 6 : firefox (CESA-2018:3006)
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Threat Intelligenceinfo

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Recommended: Upgrade
Status: 🔍

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Upgrade: Firefox 63.0


06/14/2018 🔍
10/23/2018 +130 days 🔍
10/23/2018 +0 days 🔍
10/23/2018 +0 days 🔍
10/23/2018 +0 days 🔍
10/24/2018 +0 days 🔍
10/26/2018 +2 days 🔍
10/26/2018 +0 days 🔍
06/03/2023 +1681 days 🔍



Advisory: MFSA 2018-26
Status: Confirmed
Confirmation: 🔍

CVE: CVE-2018-12392 (🔍)

SecurityTracker: 1041944
SecurityFocus: 105723 - Mozilla Firefox ESR CVE-2018-12389 Multiple Memory Corruption Vulnerabilities

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Created: 10/26/2018 07:13 AM
Updated: 06/03/2023 07:49 AM
Changes: 10/26/2018 07:13 AM (71), 04/06/2020 05:18 PM (13), 06/03/2023 07:49 AM (4)
Complete: 🔍


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